Hoisting mechanism.



E. HUBBACK.

HOISTING MECHANISM.

APPLICATION FILED NOV. 16, 1914.

LwQfiWQ Patented May 11, 1915.

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1o are adapted for use in connection with the JS IE AT NT mama Y 1rnwaatn nuim'acky or 8mm wssnmeron.

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Be it known that LEDWARD Hr'm'nAoK, a citizen of the United States, anda resident of Seattle, in the county of King and State of Washin ton,have invented certain new and useful provements iii Hoisting Mechanisms,of which the following is a specifi- Th1s invention relates to hoistingmechamsmsfimd more especially to such devlces as beds, or boxes, ofmotor trucks and the like, and has for its principal object to provide apower-operated device of" this character by means of which a heavilyloaded truck may be quickly and conveniently emptied of its contents.

Other objects will appear as the invention is more fully described andexplained in the followings'pecification', illustrated in theaccompanying drawings and pointed out in the appended claims.

In the drawings, Figure 1 is a fragmentary, side elevation of anautomobile truck", with my device applied thereto; Fig. 2 is a similarview showing the truck bed in its operative position. Fig. 3 is a planview of Figs. land 2, with the rear portion broken away. Fig.- 4 is anenlarged sectional view upon the line mw of Fig. 3.

Referring now more particularly to the drawings, reference numeral 1designates the parallel side members of the chassis, or frame, of amotor truck: 2, its engine, which is supported upon the bed or floor 3extending from one ofthe said side members to the other: 5, the flywheel of the engine and 6, its sha 6 indicates the" truck wheels: 6 thebox: 6 the drivers seat, the said box being pivoted at 6 to the truckframe.

7 a is the countershaft: 7 its s rocket wheel connected by means of achain 7 to the rear axle of the traction 'wheel. Secured to one of thesaid side members by any suitable means such as bolts indicated at 7, isa plate 8, extending upwardly from which are bearings 9, in each ofwhich is a disk 9" which is revoluble with. respect to its bearing andwhich is eccentrically boredto receive the shaft 10: the said shaft,however, is concentric with the friction wheel 11 which is affixed tothe said shaft. Aflixed to the disks 9 are the ends of a yoke 12 havingan upwardly projecting handle, or lever, 13. The rear end of the shaft10 is operatively con-' nors'rm na'enamsm.

indicatedat 1 1, which may be supports upon thebed 3 in any suitablemanner, and connected with the said pump is a pipe-15 which passes tothe rear, and at 16', it is joined to a pipe 17 which extends athwartthe truck frame, as bestseen in Fig. 3. The-pipe 17 connects the twocylinders 18, within each of which works-a piston 19, and extending fromone. of the said cylinders to the other is a pipe 20: A

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short pipe 21 connects the said pump with the pipe 20 and a bypass 22connects the pi e 21 with the pipe 15, there being a check jva Ye,indicated at a two-way cock, indicated at 23', in the by rear end ofeach of the stems of the pistons 19 is connected one end of a flexiblemember of any suitable material, indicated at 24:, the opposite end of23, in thepipe 15,- and,

which is passed around .lthe heel of a lever 25 and secured thereto bypassing'the said flexible member through a suitable aperture in the edgeof the said lever and fastening a nut 26 to the said flexible member, asseen in Figs. 1 and 2; The-said leve'i' m ay' be cut away, as at 27, sothat the said nut may be more easily manipulated. There are two of thelevers 25, one upon each side of the truck frame, and each is pivoted at28 with respect to the truck'frame. The box 6' may have a tailboard 29hinged at 29, and a hook 30 which is-adapted to be engaged with a bolt,or pin, 31, to hold the tailboard in its closed position.

The cylinders 18, as well as all of the pipes above described, containfluid, preferably oil, and normally the friction wheel 11 is out ofengagement with the fly-wheel 5.

When it is desired to unload the truck all that is necessary is to firstclose the two Way cook 23, then move the free end of the lever 13 aboutits pivot, represented by the center of the disks '9, so as to bring thefriction wheel 11 into operative engagement with the fly-wheel 5, bywhich means, of course, the pump 14 is set in motion, which causes thefluid to pass through the pipe 15, in the direction indicated until itreaches the pipe 17 rent of the fluid diverges, the arrows along thepipe the pistons 19 to move forwardly and force the fluid in-the samedirection as indicated by the arrows upon the cylinders 18 and along thepipe 20. Thisforward movement of the pistons 19, through the flexiblewhere the curas indicated by 17 which causes- 1e When the box 6 has beenunloadedand it connections 24, causes the levers25 to move about theirrespective pivots 28, until they finally assume their positions as seenin Fig. 2. This movement of the levers 25 elevates the forward end ofthe l0ox'6 because the rollers 32, which are uponthe ends of saidlevers, are in constant contact with the ledges 33 one of which is ateach side of the said box, as will be'un'derstood.

is desired to lower same to its normal position all that is, necessaryis to open the cock 23 in the bypass 22 and, by means of the lever 13,move the friction wheel 11 out of engagement with the fly-wheel 5, whlchstops the pump 14 and allows the box 6 I by Letters Patent is 1. In adevice of the class described, the combination with a truck and itsengine of a box pivoted to the truck frame, levers 2. In a device of theclass described, the

combination with a power truck, having a box pivoted to the truck frame,of a pair of levers pivoted to the frame of the truck and adaptedtorotate said box about its pivot, a ledge upon each side of the saidbox and which is constantly in engagement wlth one of the said levers, apump and a system of fluid containing pipes and cylinders connectedthereto, the said pipes having a check valve andatwo-Way cock, pistonsfor the said cylinders, operative flexible connections between the saidpistons and the said levers, means for operatively connecting the pumpwith the engine of the truck, said means including a friction wheel andan operating yoke and lever. EDWARD HUBBACK.

Witnesses:

FRED P. Gomez, 1 WINIFRED KNOPH.

